External ankle brace

ABSTRACT

An external ankle brace for restricting movement of an ankle in a first direction and permitting movement of the ankle in a second direction includes a rigid heel enclosure having a rear portion and a forward portion. A lateral upright extension is perpendicular to the rigid heel enclosure and is attached to the lateral sidewall. A medial upright extension is perpendicular to the rigid heel enclosure and is attached to the medial sidewall. At least a chosen one of the lateral and medial upright extensions is selectively pivotally attached to a corresponding lateral or medial sidewall and includes a pivot prevention feature configured to selectively prevent pivoting of the chosen one of the lateral and medial upright extensions with respect to the corresponding lateral or medial sidewall.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No. 15/642,430, filed Jul. 6, 2017, which is a continuation-in-part of U.S. patent application Ser. No. 15/074,339, filed 18 Mar. 2016, which claims the benefit of U.S. Provisional Patent Application Ser. No. 62/135,823, which was filed on 20 Mar. 2015. Each of these applications is incorporated herein by reference, in its entirety, for all purposes.

TECHNICAL FIELD

The disclosure pertains generally to preventative and rehabilitative equipment, and more particularly to an ankle brace.

BACKGROUND

In the world of sports, ankle injuries are among the most common cause of lost playing time in a sporting career, with a typical ankle injury leaving the athlete out of competition for up to a month. Ankle sprains occur when there is a rapid shifting of weight from one direction to another. The force generated from the movement causes the foot to roll either inwards, which is known as inversion rotation; or outwards, which is known as eversion rotation. Both the inversion and eversion motion of the ankle cause the ligaments on the outside of the ankle to stretch or tear depending on the force that was generated during the movement.

Current braces vary from woven fabric that acts as a glove and wraps around the ankle, to rigid plastic uprights that are strapped around the ankle. The woven fabric braces typically are made of a thin fabric that envelope the ankle and are laced together to support the ankle from both inversion and eversion rotation. The main drawback with these types of braces is that the material lacks the resistance to prevent the ankle from rolling under intense forces. Further, fabric braces also have to be worn within the shoe, which causes the shoe to fit tighter or, in some cases, forces the user to move up a shoe size in order to wear the brace. In terms of the rigid uprights braces, these braces are typically much heavier than the fabric braces and also much larger. Fitting a rigid brace into a tight shoe almost never works, which forces the user to move up to the next shoe size to accommodate for the bulkiness of the brace. When the user moves up a shoe size, the shoe is no longer sized correctly for the foot and thus loses a portion of its intended use and purpose. These braces leave the user at risk for further injury because either the brace isn't strong enough to support the ankle or the shoe isn't fitted properly to the foot.

SUMMARY

In an embodiment, an external ankle brace for restricting movement of an ankle in a first direction and permitting movement of the ankle in a second direction is provided. The external ankle brace is disposed on the exterior of a shoe and the shoe has a heel portion, a sole, and oppositely disposed sides. A rigid heel enclosure has a rear portion and a forward portion. The rear portion is for receiving the heel of the shoe. The forward portion has a medial sidewall and a lateral sidewall for surrounding the sides of the shoe. A lateral upright extension is perpendicular to the rigid heel enclosure and is attached to the lateral sidewall. A medial upright extension is perpendicular to the rigid heel enclosure and is attached to the medial sidewall. A lower fastening system comprises at least one connecting strap for connecting the lateral sidewall to the medial sidewall underneath the sole of the shoe. An upper fastening system comprises at least one connecting strap for removably connecting the lateral sidewall to the medial sidewall across the top of the shoe. At least a chosen one of the lateral and medial upright extensions is selectively pivotally attached to a corresponding lateral or medial sidewall. The chosen one of the lateral and medial upright extensions includes a pivot prevention feature configured to selectively prevent pivoting of the chosen one of the lateral and medial upright extensions with respect to the corresponding lateral or medial sidewall.

BRIEF DESCRIPTION OF THE DRAWINGS

These and other features, aspects, and advantages of the present disclosure will become better understood when the following detailed description is read with reference to the accompanying drawings in which like numerals are used to indicate like structure throughout the various figures.

FIG. 1 is a lateral side view showing a first embodiment of the external ankle brace with an athletic shoe.

FIG. 2 is a perspective view of the external ankle brace of FIG. 1 from the medial side.

FIG. 3 is a perspective view showing the underside of the external ankle brace of FIG. 1.

FIG. 4 is a perspective view of the external ankle brace of FIG. 1 from the lateral side.

FIG. 5 is a top view of the external ankle brace of FIG. 1.

FIG. 6 is a rear view of the external ankle brace of FIG. 1.

FIG. 7 is a lateral side view depicting a second embodiment of the external ankle brace.

FIG. 8 is a rear view of the embodiment of FIG. 7.

FIG. 9 is a medial side view of the embodiment of FIG. 7.

DETAILED DESCRIPTION

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as is commonly understood by one of skill in the art to which the present disclosure pertains.

In the context of the present disclosure, the singular forms “a,” “an” and “the” can include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising,” as used herein, can specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof.

As used herein, the term “and/or” can include any and all combinations of one or more of the associated listed items.

As used herein, the term “and/or” can include any and all combinations of one or more of the associated listed items.

It will be understood that when an element is referred to as being “on,” “attached” to, “connected” to, “coupled” with, “contacting,” etc., another element, it can be directly on, attached to, connected to, coupled with or contacting the other element or intervening elements may also be present. In contrast, when an element is referred to as being, for example, “directly on,” “directly attached” to, “directly connected” to, “directly coupled” with or “directly contacting” another element, there are no intervening elements present. It will also be appreciated by those of skill in the art that references to a structure or feature that is disposed “adjacent” another feature may have portions that overlap or underlie the adjacent feature.

Spatially relative terms, such as “under,” “below,” “lower,” “over,” “upper” and the like, may be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms can encompass different orientations of the apparatus in use or operation in addition to the orientation depicted in the figures. For example, if the apparatus in the figures is inverted, elements described as “under” or “beneath” other elements or features would then be oriented “over” the other elements or features.

It will be understood that, although the terms “first,” “second,” etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. Thus, a “first” element discussed below could also be termed a “second” element without departing from the teachings of the present disclosure.

The invention comprises, consists of, or consists essentially of the following features, in any combination.

Ankle injuries are among the most common cause of lost playing time in a sporting career and although there are current preventative solutions, those current braces leave the user at risk for further injury because either the brace isn't strong enough to support the ankle or the shoe isn't fitted properly to the foot since “inside the shoe” braces tend to force the user to use a bigger shoe size. The present disclosure provides a rigid support and a much faster application time, all without compromising the fit of the shoe.

The present disclosure relates to an external ankle brace that is adapted to fit around a shoe to prevent and minimize injury to an ankle. The shoe having a heel portion, a sole, and oppositely disposed sides. The interaction between the external ankle brace and the shoe can be seen in FIG. 1.

The external ankle brace of the present disclosure is generally indicated at 50 in FIG. 2. The external ankle brace 50 includes a rigid heel enclosure 10, a lateral upright extension 20, a medial upright extension 22, a lower fastening system 24, and an upper fastening system 28.

The rigid heel enclosure 10 has a rear portion 12 (FIG. 3), for receiving the heel of the shoe, and a forward portion 14, for surrounding the sides of the shoe. The heel enclosure 10 may be made from rigid plastic pieces or any other suitable material. The forward portion 14 further includes a medial sidewall 16 and a lateral sidewall 18. The rigid heel enclosure 10 also has an upper end 36 (FIG. 2) for receiving the upright extensions 20 and 22, and a lower end 38 for surrounding the bottom of the shoe.

The lateral upright extension 20 is oriented generally perpendicular to the rigid heel enclosure 10 and is pivotally attached to the lateral sidewall 18 at the upper end 36 by a lateral ankle joint 32 (FIG. 4). The joint allows the lateral upright extension 20 to rotate during motion giving the external ankle brace a less restrictive feel compared to previous braces. The lateral upright extension 20 may be made from plastic or any other suitable material. The lateral ankle joint 32 includes a fastener 47 and allows the lateral upright extension 20 to rotate relative to the lateral sidewall 18. Although the current embodiment uses a screw as the fastener 47, one having ordinary skill in the art will appreciate that a pivot hinge, hex nut, revolving joint, or any other suitable member of the type commonly known in the art could be used to allow the joint to pivot. As shown in FIG. 5, the lateral upright extension 20 has a concave shape for increased comfort for the user. The lateral upright extension 20 can also include foam padding on the interior side 21 (FIG. 2) of the lateral upright extension 20 to increase comfort and to allow a better fit for the user.

The medial upright extension 22 is perpendicular to the rigid heel enclosure 10 and is pivotally attached to the medial sidewall 16 at the upper end 36 by a medial ankle joint 34. The medial upright extension 22 may be made of rigid plastic or any other suitable material. The medial ankle joint 34 has a fastener 47 and allows the medial upright extension 22 to rotate relative to the medial sidewall 16. To adjust for anatomical positioning of the ankle, the medial ankle joint 34 is positioned closer to the upper end 36 than the position of the lateral ankle joint 32. Although the current embodiment uses a screw as the fastener 47, one having ordinary skill in the art will appreciate that a pivot hinge, hex nut, revolving joint, or any other suitable member of the type commonly known in the art could be used to allow the joint to pivot. As shown in FIG. 5, the medial upright extension 22 has a concave shape for increased comfort for the user. The medial upright extension 22 can also include foam padding on the interior side 23 (FIG. 4) of the medial upright extension to increase comfort and to allow a better fit for the user.

The lower fastening system 24 has at least one connecting strap 26 and at least one strap fastener 48 for connecting the lateral sidewall 18 to the medial sidewall 16 (FIG. 2) while passing underneath the sole of the shoe. Although the current embodiment uses a rubber strap 26, one having ordinary skill in the art would appreciate that plastic, nylon, or any other suitable strap type that is commonly known in the art could be used. Similarly, although the current embodiment uses rivets 48 to fasten the straps to each of the lateral and medial sidewalls 18 and 16 respectively, any other fastener could be used.

The upper fastening system 28 has at least one connecting strap 30 and at least one strap fastener 48 (FIG. 4) for removably connecting the lateral sidewall 18 to the medial sidewall 16 while passing over the top of the shoe. The upper fastening system further includes a D-ring 31 which is fixed on the lateral sidewall. The Velcro strap 30 is fixed to the medial sidewall and is looped through the D-ring 31 and overlaps back onto the strap 30. This allows for an adjustable fastening system to accommodate various sizes without compromising support. Although the current embodiment uses a Velcro strap 30 to removeably connect the sidewalls 16 and 18, one having ordinary skill in the art would appreciate that any kind of removable and adjustable strap can be used. Similarly, although the current embodiment only uses one connecting strap 30, any number of straps can be used to removably connect the sidewalls 16 and 18 over the top of the shoe.

As shown in FIG. 5, the external ankle brace 50 restricts movement of the ankle in the first directions indicated by arrows 44 and permits ankle movement in the second directions indicated by arrows 46.

Another embodiment (not shown) could include an upright fastening system 40 (FIG. 1), which would have at least one connecting strap for removably connecting the lateral upright extension 20 to the medial upright extension 22 above the ankle. This connecting strap could be Velcro or any other type of strap that would allow for an adjustable and removable connection.

FIGS. 7-9 depict an external ankle brace 50′ of a second embodiment. The external ankle brace 50′ of FIGS. 7-9 is similar to the external ankle brace 50 of FIGS. 1-6 and therefore, structures of FIGS. 7-9 that are the same as or similar to those described with reference to FIGS. 1-6 have the same reference numbers with the addition of a “prime” mark. Description of common elements and operation similar to those in the previously described first embodiment will not be repeated with respect to the second embodiment.

In FIGS. 7-9, the external ankle brace 50′ of the second embodiment, in contrast to that of the first embodiment, is configured with lateral and/or medial ankle joints 32′ and 34′ that selectively pivotally connect their corresponding lateral and/or medial upright extensions 20′ and 22′ to the corresponding lateral and/or medial sidewalls 18′ and 16′ and thus selectively allow the lateral and medial upright extensions 20′ and 22′ to move in the second direction relative to the heel enclosure 10′. Stated differently, the external ankle brace 50′ of the second embodiment allows a user, or an associated medical professional, to “lock” pivoting of the external ankle brace 50′ as desired, either for an entirety of the use/wear, or for a predetermined period of time during use of the external ankle brace 50′ by the user. For example, the external ankle brace 50′ could be prevented from the above-described pivotal movement in the second direction during an initial phase of healing of an injury, and then the external ankle brace 50′ could be released to allow pivotal movement in the second direction once it is determined that such may be beneficial, or at least not detrimental, to the healing of that injury.

In order to provide such selective pivotal movement, the external ankle brace 50′ of the second embodiment could include at least a chosen one (and/or both) of the lateral and medial upright extensions 20′ and 22′ which is selectively pivotally attached to a corresponding lateral or medial sidewall 18′ and 16′. The chosen lateral and/or medial upright extensions 20′ and 22′ may include a pivot prevention feature 100 which is configured to selectively prevent pivoting of the chosen one of the lateral and medial upright extensions 20′ and 22′ with respect to the corresponding lateral or medial sidewall 18′ and 16′.

As shown in FIGS. 7-9, the pivot prevention feature 100 may include a “tongue” or extension 102 from the corresponding lateral and/or medial upright extensions 20′ and 22′ downward toward the heel enclosure 10′. That extension 102 is then selectively secured to the corresponding lateral or medial sidewall 18′ and 16′ through use of a fastener 104, such as, but not limited to, the depicted screws. The combination of the extension 102, the fastener 104, and the lateral and medial sidewalls 18′ and 16′ then serves to inhibit or prevent pivoting or rotation of the lateral and/or medial upright extensions 20′ and 22′ with respect to the lateral or medial sidewalls 18′ and 16′. While the extension 102 is shown as reaching substantially downward from a corresponding lateral and/or medial upright extensions 20′ and 22′ in FIGS. 7-9, it is also contemplated that the extension 102 could be oriented differently with respect to the remaining portions of the corresponding lateral and/or medial upright extensions 20′ and 22′, or the fastener 104 could be associated with the corresponding lateral and/or medial upright extensions 20′ and 22′ without the use of an extension 102, such as by extending the lateral and medial sidewalls 18′ and 16′ upward to allow placement of the fastener 104 above the lateral and/or medial ankle joints 32′ and 34′.

The pivot prevention feature 100 depicted in the FIGS. is just one nonlimiting example, in fact, of any of a number of suitable mechanisms which can help with selectively inhibiting pivoting or rotation of the lateral and/or medial upright extensions 20′ and 22′ with respect to the lateral or medial sidewalls 18′ and 16′. Other suitable mechanisms could include latches, frictional fit features, hooks, clips, straps, or any other structure which may be helpful in allowing selective prevention of at least some degree of rotation of the lateral and/or medial upright extensions 20′ and 22′ with respect to the lateral or medial sidewalls 18′ and 16′. One of ordinary skill in the art will be able to provide a suitable pivot prevention mechanism 100 for a particular use environment of the external ankle brace 50′.

Embodiments can minimize ankle inversion and eversion during physical activity and/or minimize ankle medial and later rotation during physical activity and/or minimize ankle plantar flexion and dorsiflexion during physical activity and/or provide stability to the mid foot in limiting pronation and supination of the foot.

Embodiments can include a foot/ankle orthotic that includes a lateral sidewall, a medial sidewall, a heel enclosed backing connecting the sidewalls, a lateral upright extension, a medial upright extension and a bottom strapping system connecting sidewalls. The lateral and medial upright extensions are attached to the sidewalls with an overlapping ankle joint off-set to accommodate for medial and lateral malleolus anatomical positioning. The lateral sidewall coincides with the outer or exterior portion of the foot/ankle and the medial sidewall coincides with the inner portion of the foot/ankle. The lateral upright extension coincides with the outer or exterior portion of the lower leg and the medial upright extension coincides with the inner portion of the lower leg. Lateral and medial extension walls are configured to rise above the ankle of the wearer of the orthotic by approximately 8-9 inches (from the bottom of the hinge to the top of the extension walls). When donned by the wearer, lateral and medial side walls also partially wrap over the top or dorsum of the foot leaving a gap of approximately 3 to 4 inches between the sidewalls. The width of the medial and lateral upright extensions is approximately 3-4 inches wide.

A feature of an embodiment is to have the securing mechanism include a hook and loop strap across the dorsal (top) of the foot. This Velcro securing strap is riveted to the in place on both the medial and later side walls. A D ring is utilized on the lateral fixation in which the Velcro strap can be fed through and secured back upon itself. The lateral and medial upright extensions are secured by two removable Velcro straps and D rings. Male component Velcro is adhesively attached to each upright and the female component Velcro strap can connect to the uprights are desired positions for appropriate fitting. As an option, the brace may also be applied with various types of athletic adhesive tape in conjunction with or instead of the Velcro strapping and D ring system.

Another feature of an embodiment is an overlapping ankle joint hinge to allow the ankle to move freely through plantar flexion and dorsiflexion. The overlapping ankle joint is located on the medial and lateral aspects of the gauntlet where the medial and lateral side bodies attach with the medial and lateral uprights respectively. The ankle joint hinge components are off set to produce a more anatomically correct gauntlet for a more fluid mobility.

Foam padding (approximately X inch) is attached to the inside of both the medial and lateral uprights to provide additional comfort and protection for the wearer. The gauntlet is sized so that one size can fit multiple size shoes. A separate gauntlet is needed to accommodate both right and left ankles.

A sheet of vacuum formable thermoplastic large enough to cover the entire mold is cut and placed in an oven to be heated to a formable temperature. These are several types and thicknesses of plastic that may be used for this fabrication including orthotic grade polypropylene, polyethylene, and copolymer.

While aspects of this disclosure have been particularly shown and described with reference to the example aspects above, it will be understood by those of ordinary skill in the art that various additional aspects may be contemplated. For example, the specific methods described above for using the apparatus are merely illustrative; one of ordinary skill in the art could readily determine any number of tools, sequences of steps, or other means/options for placing the above-described apparatus, or components thereof, into positions substantively similar to those shown and described herein. In an effort to maintain clarity in the Figures, certain ones of duplicative components shown have not been specifically numbered, but one of ordinary skill in the art will realize, based upon the components that were numbered, the element numbers which should be associated with the unnumbered components; no differentiation between similar components is intended or implied solely by the presence or absence of an element number in the Figures. Any of the described structures and components could be integrally formed as a single unitary or monolithic piece or made up of separate sub-components, with either of these formations involving any suitable stock or bespoke components and/or any suitable material or combinations of materials. Any of the described structures and components could be disposable or reusable as desired for a particular use environment. Any component could be provided with a user-perceptible marking to indicate a material, configuration, at least one dimension, or the like pertaining to that component, the user-perceptible marking potentially aiding a user in selecting one component from an array of similar components for a particular use environment. A “predetermined” status may be determined at any time before the structures being manipulated actually reach that status, the “predetermination” being made as late as immediately before the structure achieves the predetermined status. The term “substantially” is used herein to indicate a quality that is largely, but not necessarily wholly, that which is specified—a “substantial” quality admits of the potential for some relatively minor inclusion of a non-quality item. Though certain components described herein are shown as having specific geometric shapes, all structures of this disclosure may have any suitable shapes, sizes, configurations, relative relationships, cross-sectional areas, or any other physical characteristics as desirable for a particular application. Any structures or features described with reference to one aspect or configuration could be provided, singly or in combination with other structures or features, to any other aspect or configuration, as it would be impractical to describe each of the aspects and configurations discussed herein as having all of the options discussed with respect to all of the other aspects and configurations. A device or method incorporating any of these features should be understood to fall under the scope of this disclosure as determined based upon the claims below and any equivalents thereof.

Other aspects, objects, and advantages can be obtained from a study of the drawings, the disclosure, and the appended claims. 

What is claimed is:
 1. An external ankle brace for restricting movement of an ankle in a first direction and permitting movement of the ankle in a second direction, wherein said external ankle brace is disposed on the exterior of a shoe and the shoe having a heel portion, a sole, and oppositely disposed sides, the ankle brace comprising: a rigid heel enclosure having a rear portion and a forward portion, wherein said rear portion is configured for receiving the heel of the shoe, and said forward portion includes a medial sidewall and a lateral sidewall for surrounding the sides of the shoe, each of the medial and lateral sidewalls having a proximal portion extending continuously from the rear portion of the rigid heel enclosure, the medial and lateral sidewalls each being configured to extend from the heel portion of the shoe in a longitudinal direction beyond a talus of a wearer's foot and toward the toe, each of the medial and lateral sidewalls having a distal portion longitudinally spaced from the proximal portion of the corresponding medial or lateral sidewall such that the distal portion is at least partially located adjacent to an instep area of a corresponding medial or lateral side of the shoe and the distal portions of the medial and lateral sidewalls are spaced apart to allow the wearer's foot to be interposed therebetween; a lateral upright extension selectively perpendicular to at least the lateral sidewall of said rigid heel enclosure and pivotally attached to the proximal portion of the lateral sidewall; a medial upright extension selectively perpendicular to at least the medial sidewall of said rigid heel enclosure and pivotally attached to the proximal portion of the medial sidewall; a lower fastening system comprising at least one connecting strap for connecting the distal portion of the lateral sidewall to the distal portion of the medial sidewall underneath the sole of the shoe longitudinally forward of the talus of the wearer's foot, wherein the at least one connecting strap of the lower fastening system has a first end portion and a second end portion, the first end portion connected to the lateral sidewall via a first fastener, and the second end portion connected to the medial sidewall via a second fastener, and wherein the lower fastening system, lateral and medial sidewalls, and rigid heel enclosure are collectively configured for defining a void underneath the sole of the shoe to allow the sole of the shoe underneath a heel of the wearer's foot to selectively contact a ground surface beneath the shoe; and an upper fastening system comprising at least one connecting strap for removably connecting said lateral sidewall to said medial sidewall across the top of the shoe, the at least one connecting strap of the upper fastening system being attached to the distal portion of at least one of the lateral or medial sidewalls so that there is a longitudinal gap between an attachment point of the connecting strap to the distal portion of the lateral and/or medial sidewalls and a corresponding one of the lateral and medial upright extensions.
 2. The external ankle brace as set forth in claim 1, further comprising an upright fastening system comprising at least one connecting strap for removably connecting said lateral upright extension to said medial upright extension above the ankle.
 3. The external ankle brace as set forth in claim 1, wherein at least one connecting strap of the upper fastening system is directly connected to distal portions of the lateral sidewall and to the medial sidewall which extend substantially longitudinally from the rear portion of the heel enclosure and are spaced longitudinally apart from the rear portion with the proximal portions of the corresponding lateral or medial sidewall interposed therebetween.
 4. The external ankle brace as set forth in claim 1, wherein the connecting strap of the upper fastening system is directly connected to portions of the heel enclosure entirely longitudinally forward of both of the medial and lateral ankle joints.
 5. The external ankle brace as set forth in claim 1, wherein: respective distal portions are also located away from the instep area of the medial and lateral sides of the shoe.
 6. The external ankle brace as set forth in claim 1, wherein the at least one connecting strap of the upper fastening system has a third end portion and a fourth end portion, wherein the third end portion is connected to the lateral sidewall via a third fastener and the fourth end portion is connected to the medial sidewall with via a fourth fastener.
 7. The external ankle brace as set forth in claim 1, wherein: the lateral upright and the medial upright are respectively made of plastic and have respective concave shapes.
 8. Footwear, comprising: the external ankle brace of claim 1; and the shoe, wherein the shoe is an athletic shoe.
 9. Footwear, comprising: the external ankle brace of claim 1; and the shoe, wherein the shoe is an athletic shoe with cleats.
 10. The external ankle brace as set forth in claim 1, wherein the heel enclosure is made of plastic and is a monolithic body.
 11. The external ankle brace as set forth in claim 1, wherein: when viewed from the bottom, the rigid heel enclosure forms a U-shaped body.
 12. The external ankle brace as set forth in claim 1, wherein: a bottom surface of the heel enclosure continuously extends from a tip of the distal portion of the lateral sidewall, to the proximal portion of the lateral sidewall, to the rear portion, to the proximal portion of the medial sidewall and then to the tip of the distal portion of the medial sidewall.
 13. The external ankle brace as set forth in claim 1, wherein: the lateral sidewall smoothly transitions from the distal portion of the lateral sidewall to a location on the proximal portion of the lateral sidewall above an uppermost portion of the lateral sidewall midway between the front and the rear of the brace when viewed from the side. 